Hello dear,I understand your concern.In my opinion there might be rarely any chance for pregnancy as the condom was intact.The risk increases with slippage or breakage of condom.As nothing happened such you need not worry.Usually pregnancy signs like nausea ,vomitings,increased urination,sore breasts start 2 weeks after missed period.And the urine pregnancy test gives accurate results a week after missed period.I suggest you to go for pregnancy test if period is delayed still.And stress regarding the thought of pregnancy or any might also delay the period.So relax and check for the period.However the chances of pregnancy are less. Best regards...Dr Srilatha